A review on the fracture properties of geopolymer composites
The fracture performance of concrete directly affects the safety and durability of the structure.The study on the law of crack propagation in concrete is the basis of analyzing the fracture performance of concrete.The fracture mechanism of concrete is very complicated and there are many influencing factors because concrete is heterogeneous,non-linear,polyphase,and has multiple initial cracks.At present,the fracture performance analysis method of ordinary cement concrete is relatively mature.According to its nonlinear characteristics,cohesive crack models and equivalent elastic fracture models have been established.Geopolymer is a kind of low-carbon and environmentally friendly building material with excellent mechanical properties,durability and high temperature resistance.Researchers carried out a study on the fracture properties of GPC based on the analytical methods of fracture mechanics of ordinary concrete.In this review,the development history of concrete fracture mechanics and the main factors affecting GPC properties are summarized.In addition,the factors affecting fracture properties of GPC are reviewed respectively,including raw material composition,alkali activators and fibers.Furthermore,the future work on the fracture properties of GPC is recommended.
万方数据
维普
